Biocompatible DCPD Coating Formed on AZ91D Magnesium Alloy by Chemical Deposition and Its Corrosion Behaviors in SBF

被引：30

作者：

Cheng, Zhongji ^{[1
]}

Lian, Jianshe ^{[1
]}

Hui, Yanxian ^{[1
]}

Li, Guangyu ^{[1
]}

机构：

[1] Jilin Univ, Coll Mat Sci & Engn, Key Lab Automobile Mat, Minist Educ China, Changchun 130022, Peoples R China

来源：

JOURNAL OF BIONIC ENGINEERING | 2014年 / 11卷 / 04期

关键词：

DCPD coating; chemical deposited method; magnesium alloy; corrosion rate; SBF; DICALCIUM PHOSPHATE DIHYDRATE; IN-VIVO CORROSION; VITRO DEGRADATION; BODY-FLUID; MG ALLOY; ELECTRODEPOSITION; HYDROXYAPATITE; DISSOLUTION; APATITE; PH;

D O I：

10.1016/S1672-6529(14)60072-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Bioactive calcium phosphate coatings were prepared on AZ91D magnesium alloy in phosphating solution in order to improve the corrosion resistance of the magnesium alloy in Simulated Body Fluid (SBF). The surface morphologies and compositions of the calcium phosphate coatings deposited in the phosphating bath with different compositions were investigated by Scanning Electron Microscopy (SEM) with Energy Dispersive Spectrometer (EDS) and X-ray Diffraction (XRD). Results showed that the calcium phosphate coating was mainly composed of dicalcium phosphate dihydrate (CaHPO4 center dot 2H20, DCPD), with Ca/P ratio of approximately 1:1. The corrosion resistance was evaluated by acid drop, electrochemical polarization, electrochemical impedance spectroscopy and immersion tests. The dense and uniform calcium phosphate coating obtained from the optimal phosphating bath can greatly decrease the corrosion rate and hydrogen evolution rate of AZ91D magnesium alloy in SBF.

引用

页码：610 / 619

页数：10

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